Add docstring test cases

Signed-off-by: Micha Reiser <micha@reiser.io>

crates/ruff_python_formatter/resources/test/fixtures/ruff/quote_style.py

@@ -36,3 +36,15 @@
 'single1' "double2"
 "double1" 'single2'
 "double1" "double2"
+
+def docstring_single_triple():
+    '''single triple'''
+
+def docstring_double_triple():
+    """double triple"""
+
+def docstring_double():
+    "double triple"
+
+def docstring_single():
+    'single'

crates/ruff_python_formatter/tests/snapshots/format@quote_style.py.snap

@@ -42,6 +42,18 @@ br"""br double triple"""
 'single1' "double2"
 "double1" 'single2'
 "double1" "double2"
+
+def docstring_single_triple():
+    '''single triple'''
+
+def docstring_double_triple():
+    """double triple"""
+
+def docstring_double():
+    "double triple"
+
+def docstring_single():
+    'single'
 ```
 
 ## Outputs
@@ -96,6 +108,22 @@ rb"""br double triple"""
 'single1' 'double2'
 'double1' 'single2'
 'double1' 'double2'
+
+
+def docstring_single_triple():
+    """single triple"""
+
+
+def docstring_double_triple():
+    """double triple"""
+
+
+def docstring_double():
+    "double triple"
+
+
+def docstring_single():
+    "single"
 ```
 
 
@@ -150,6 +178,22 @@ rb"""br double triple"""
 "single1" "double2"
 "double1" "single2"
 "double1" "double2"
+
+
+def docstring_single_triple():
+    """single triple"""
+
+
+def docstring_double_triple():
+    """double triple"""
+
+
+def docstring_double():
+    "double triple"
+
+
+def docstring_single():
+    "single"
 ```
 
 
@@ -204,6 +248,22 @@ rb"""br double triple"""
 'single1' "double2"
 "double1" 'single2'
 "double1" "double2"
+
+
+def docstring_single_triple():
+    """single triple"""
+
+
+def docstring_double_triple():
+    """double triple"""
+
+
+def docstring_double():
+    "double triple"
+
+
+def docstring_single():
+    "single"
 ```